Apparatus for cooling, moistening, and purifying the air in rooms.



No. $47,232.v PATNNTIID MAR. I2, 1907.

D. BUNLNIANN.I APPARATUS FOR OOOLING, MOISTENING, AND PURIFYING THE AIR IN ROOMS.

APPLICATION FILED YEB.23, 1905.

` y UNITED STATES PATENT oEEIoE.

DORABUHLMANN, oF KAISERSLAUTERN, eijiiaMANY. A

APPARATUS FOR COOLING, MOlSTlENING, AND PURIFYING THE AIR IN ROOMS. I

Specification of Letters Patent. u

Patented March 12, 1907.

` Application tied Febuary 23, 1905. serial N o. 246,918. 9

To all whom it may con/cern,.-

Be it known that I, DQRABUHLMANN, a subject of the German Emperor, residing at Kaiserslautern, Germany, have invented a 5 new and useful Apparatus for Cooling, Moistening, and Purifying the in Rooms, of

. which the following is a specification. p My 'invention relates to .an apparatus which whilecooling and moistening the air roof-a ,room removes from it noxious gases,

dust, and other impurities. These advantages are obtained by causing the air to cir- -culatethrough `the apparatus, into which it is drawn by means of a rotary Ventilatinga pump or ,similar device, and from which it l,issues in a cooled,cpurified, and moistened state after coming 1n contact with certain substances of a refrigeratinggnature stored in the chambers or compartments of the said zo apparatus. j

apparatus constructed according to the principles of my invention is .represented in the accompanying drawings, wherein .Figure 1 is a longitudinal section, and Fig. z 5 .12? a cross-section taken on the -line A VB in 1g. 1. l Similar letters refer to similar parts in both views.

' The case a., made of any material that is a '30 non-conductor of heat and can be suitably employed for such apurpose, is constructed, as shown, with double walls, and the space between the outervand inner walls may be "filled `with any suitablelight insulating substance-for instance, silk-waste-the object v being toprevent the air within the apparatus from being affected by the temperature of the outer air. A rotary Ventilating pump b is provided'for drawing air from the room 4oy into the appara/tus through the opening c.

Lodged within the case a is the refrigerating device f, constituting three distinct ves- `sels g h i. The vesseljg is intended to contain ice, the vessel h water,and the vessel 'i salt, ammoniac nitrate, or other substance or substances which may ble deemed tohave a v cooling, refreshing, or puryifying effecten the air assing through the apparatus. The

walls o' the vessels h and 'i are perforated, asv

also are the inner walls and the bottom of the vessel g. l

l d indicates an air-passage, and 7c a water- 'chamoer with a' perforated bottom intended to be partly'filled with salt, ice, or any suitable substance or substances which may be dust and other impurities.

` deemed to have a cooling, refreshing, or

purifying effect on the air passing through the apparatus. The refrigerator f and the partition Zbelow the water-chamber k are provided with openings m. A double sliding 6o device n, which can be actuated from outside the case a, serves to close or partly close these openings.

o indicates a receptacle, which may consist merelyof an open framework, or it may be any open-sided structure through which air can freely pass, resting on a platform or provided with a bottom, the platform or the bottom, as the case maybe, being perforated to allow water to'pass freely from this re- 7o ceptacle into the lowermost chamber or tank s of the apparatus. In the receptacle o is loosely piled af sufficient quantity of dried branch clippings or twigs preferably taken from alder. or beech trees, in such a way 75 n that the water falling from the upper compartments of the apparatus may drip from branch to branch. Y

p is anair-pass'age, the perforated ioor or platform r of which is intended to be covered 8o with a layer of yice. l

y t' is a pipe for restoring to the vessel h by means of a force-pump u the water collecting in the tank s. A

The apparatus may be 'rovided with` 85 wheels or rollers, as shown in t e drawings, to facilitate its transport from room to room.

The apparatus operates as follows: The outer air is drawn vinto the case 'o1/.by the action of thev ventilator-pump b `(to which any 9o suitable motive Lpower may be applied) through the openingc.- More than one such opening maybe provided. The current of Yairpasses downward and through the passage d while being cooled by the proximity of 5 the ice deposited in the vessel g and the water in the vessel 7L, as welll as by the refrigerating mixture of ice-water and salt contained in the chamber c. The airis still further cooled by its passage through the re-. roo ceptacle 0, into which falls the fluid from 4the chamber 7c.' Here, also, itj is moistenedV by' direct contacty with this fluid, whi-le fthe branch clippings or twigs, lodged for this purpose in the said receptacle o, ridv itof m5 g The moist purified air then passes over the layer of ice in the passage p, whereby its temperature is still further reduced before issuing from the apparatus by the action of the ventilator- '119 pump b to reenter the room from which it was ori inally drawn or to pass into another l room if suitable means of communicationi are provided. The melted ice from g, the water from h, and the salt from t' assing gradually from these compartments, t rough l the bottom-openings provided for this purpose, into the chamber k after mingling with one another through the side perforations in said compartments constitute the refrigerating mixture. Although alder and Zbeech trees are mentioned above owing to the pliancy of their small wood, any suitable branch clip ings, twigs, brambles, or a suitable artificia structuresay of wire-#on which the water may dripA can be employed to the same end.

Having describedv my invention, what I claim, and desire to secure by Letters Patent may be stopped, or partly stopped, a perforated partition below thisdevice, an opensided receptacle 0 below this partition con-A structed to allow free ingress and egress of water and air, an air-passage p below this receptacle with a perforated floor, a tank s below this passage, a force-pump u and a' pipe i for raising water from this tank to the vessel h and a rotary Ventilating-pump b to draw air through one or more openings into the apparatus, the whole substantially as described and as shown in the accompanying i drawings.

2. In an apparatus for cooling, moistening.

and purifying the air in rooms, the combination with an outer case a having double walls made of insulating material, the space between them containing an insulating medium, of a cooling vessel f provided with openings in its bottom and divided into compartments by perforated partitions, the outermost com artment g being destined to containice, tiie intermediate compartment h to contain water andthe innermost compart ment i to contain salt, ammonia nitrate, or other refrigerating substance, an air-passage d below the vessel f, a tank with a perforated bottom destined to receive substances falling from the vessel f and to hold a layer of ice or other suitable refrigerating substances, a sliding device n for closingy or partly closing the openings m immediately above and below it, an open-sided receptacle 0 below, a perforated partition fl intervening between it and thetank 7c, said receptacle 0 containing portions of tree-branches, brambles, or an equivalent artificial structure and constructed to allow the free passage through it of water and air, anairassage p below this receptacle, with a per orated floor on which may be deposited a layer of ice,'a tank s belowthis passage, a force- .ump u and a pipe t for raising water from th vessel land a rotary Ventilating-pump I) to draw air through one or more openings into the apparatus, the whole substantially as described and as shown in the accompanying drawings.

my hand in presence of two witnesses.

f DORA BUHLMANN. Witnesses:

BERNHARD FELD,

MICHAEL ZIMMERMANN.

is tankto the I In testimony whereof I have hereunto set 

